<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .outBox{
            width: 500px;
            height: 500px;
            background: #123;
            -webkit-filter: blur(2px);
        }
        .inBox{
            -webkit-filter: blur(0);
        }
        .outBox,.inBox{
            position: absolute;
        }
    </style>
</head>
<body>
    <div class="outBox">

    </div>
    <div class="inBox">
        <img src="images/123.jpg" alt="">
    </div>
</body>
</html>